WNS Series Gas-fired Steam boiler

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  WNS series horizontal internal combustion boiler is a boiler shell type 3 passes wetback oil/gas fired boiler. After fuel is being atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, this is 1st pass; the high temperature smoke is collected in reversal chamber and then enters 2nd pass which is grooved tubes bundle area; after heat convection, air temperature gradually falls and goes to front smoke box and turn to 3rd pass, which is smooth tubes bundle area, and then enters chimney passing back smoke box and exhausted to the atmosphere.

  This series of products are safe, reliable, efficient, energy-saving environmental protection,maintenance convenient, durable, automatic intelligent control,etc..All the performance indexes are higher than the design requirements,and have reached the advanced level of domestic and international.

  • Parameter
  • Characteristics
  • System flow chart
  • Related Case
Model WNS1-0.7-Y(Q)
WNS1-1.0-Y(Q)
WNS1.5-1.0-Y(Q) WNS1.5-1.25-Y(Q) WNS2-1.0-Y(Q) WNS2-1.25-Y(Q) WNS3-1.0-Y(Q)
WNS3-1.25-Y(Q)
WNS4-1.25-Y(Q)
WNS4-1.6-Y(Q)
WNS5-1.25-Y(Q)
WNS5-1.6-Y(Q)
Rated steam capacity(t/h) 1 1.5 2 3 4 5
Rated working pressure(Mpa) 0.7/1.0 1.0/1.25 1.0/1.25 1.0/1.25 1.25/1.6 1.25/1.6
Rated steam temperature(℃) 170/184 184/194 184/194 184/194 194/204 194/204
Feeding water temperature(℃) 20 20 20 20 20 20
Heating area(㎡) Body 24.06 27.33 58.15 89.99 112.59 163.1
Condenser 15.4 20.5 29.64 45.6 53.54 65.89
Thermal efficiency(%) >98 >98 >98 >98 >98 >98
Fuel Nature gas, coke oven gas, biogas, methanol, light oil etc.
Combustion equipment burner
General power (KW) 3.6 4 .8 7.0 10.5 13 16.5
Feed pump model JGGC2-8×16 JGGC2-8×16 JGGC2.4-8×18 JGGC4-8×18 JGGC4.8-8×22 JGGC6-8×18
consumption Light oil 66 99 113 196 266 332
nature gas 72 108 144 216 288 360
Max part weight 4 4.5 8.5 8.9 13.3 14.3
Max dimension of delivery
(m)(L×W×H)
3.25×1.8×2.1 3.0×1.8×2.01 4.4×2.1×2.46 4.6×2.31×2.62 4.7×2.48×2.85 5.33×2.65×3.3
Model WNS6-1.25-Y(Q)
WNS6-1.6-Y(Q)
WNS8-1.25-Y(Q)
WNS8-1.6-Y(Q)
WNS10-1.25-Y(Q)
WNS10-1.6-Y(Q)
WNS15-1.25-Y(Q)
WNS15-1.6-Y(Q)
WNS20-1.25-Y(Q)
WNS20-1.6-Y(Q)
Rated steam capacity(t/h) 6 8 10 15 20
Rated working pressure(Mpa) 1.25/1.6 1.25/1.6 1.25/1.6 1.25/1.6 1.25/1.6
Rated steam temperature(℃) 194/204 194/204 194/204 194/204 194/204
Feeding water temperature(℃) 20 20 20 20 20
Heating area(㎡) Body 181.17 190.77 229.95 346.2 467.6
Condenser 78.25 108.5 165.3 216.2 360.3
Thermal efficiency(%) >98 >98 >98 >98 >98
Fuel Nature gas, coke oven gas, biogas, methanol, light oil etc.
Combustion equipment burner
General Power(KW) 19.5 29.5 33 60 90.5
Feed pump model JGGC6-8×19 JGGC9-15×10 JGGC12.5-15×11 JGGC16-15×12 JGGC25-35×5
Fuel consumption Light oil 399 532 660 997 1204
nature gas 432 576 720 1080 1440
Max part weight(t) 19.5 22.6 25.8 34.7 46
Max dimension of delivery
(m)(L×W×H)
5.93×2.6×3.02 5.85×2.8×3.1 7.65×2.81×3.1 6.95×3.1×3.6 8.3×3.4×4.02

01

Digitized manufacture
  • The key part such as material cutting, rolling, drilling are proceeded by advanced CNC machining process to reduce the assemble stress and extend boiler working lifetime.
  • The front and back smoke chamber plates are cut by CNC plasma cutting machine and looks tidy and beautiful.
  • Digitized manufacture

    02

    Easy operation and maintenance
    Fully automatically operating, with automatically adjustment and protection of burning, water level, temperature and steam pressureEasy operation and maintenance

    03

    longer working life
  • Smoke tube and tube sheet connection is expanded first to eliminate the gap between them, then adopt automatic argon arc welding to relief the stress and expand boilers working life.
  • Longitudinal and girth joint adopt advanced automatic submerged-arc welding for good welding quality. All longitudinal and girth joint will have 100% radiographic inspection.
  • Fin tube us ND steel or stainless-steel material which avoid low temperature corrosion.
  • Inspection procedure point is set up to guarantee the sequence of expanding and welding, avoid cracking of the tube sheet holes.
  • longer working life

    04

    less fuel consumption
  • High quality aluminum silicate fiber is used with fire clay insulation, to control the boiler body temperature below 45℃ to control heat lost.
  • Sufficient steam storage room and heating area makes boiler to generate high quality steam and high thermal power Condenser is added to reuse the waste heat of the exhausted smoke to increase feeding water’s temperature and reduce emission temperature, which can increase the thermal efficiency above 98% and save operating cost.
  • less fuel consumption

    05

    Add condensator at the end of flue gas duct
  • Add condensator . Use the waste heat of flue gas exhausted from the end of boiler to increase the water inlet temperature and decrease the exhaust gas temperature . This makes the boiler heat efficiency reach above 98% and save the operating cost.
  • Condensator adopts finned tubes to increase heating area , heating transfer efficiency and decrease the volume.
  • Finned tube adopts ND steel or stainless steel to avoid low temperat - ure corrosion of steel
  • Add condensator at the end of flue gas duct

    06

    Thread smoke tube
  • Advanced manufacturing process . Adopt assembly line automatic spinning work.
  • Strengthen heat transfer to improve boiler heat efficiency.
  • Thread smoke tube is efficient heat transfer component researched by our company for years . After constantly optimization , the selection of thread groove depth and pitch could reach the following result when meeting the lowest flow resistance , heat transfer coefficient is 1.2 times higher than common smoke tube .
  • Thread smoke tube

    07

    08

    WNS Series Gas-fired Steam boiler-System flow chart

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